C#_Call an encapsulated class to implement the function of exporting Excel tables

Preface

The function of exporting Excel tables is available in most forms. If a class is encapsulated, calling this class directly when using it is not more convenient? , which also reduces the duplication of code, why not?

Operation

First add a reference, select Microsoft Office 16.0 Object Library, and Microsoft Excel 16.0 Object Library in com.

Add namespace:

using Microsoft.Office.Interop.Excel;//导出Excel
using Microsoft.Office.Core;
using System.Data.OleDb;
using System.Windows.Forms;

Create a new class and name it outputExcel, the code is as follows:

public  class outputExcel
    {
        //导出excel
        public void RExcel(string name, DataGridView dgv)
        {
            //总可见行列数
            int rowCount = dgv.Rows.GetRowCount(DataGridViewElementStates.Visible);
            int colCount = dgv.Columns.GetColumnCount(DataGridViewElementStates.Visible);

            //如果没有数据
            if (dgv.Rows.Count == 0 || rowCount == 0)
            {
                MessageBox.Show("表中没有数据", "提示");
            }
            else
            {
                //创建文件的路径
                SaveFileDialog save = new SaveFileDialog();
                save.Filter = "excel files(*.xlsx)|*.xlsx";
                save.Title = "请选择要导出数据的位置";
                save.FileName = name + DateTime.Now.ToLongDateString();

                if (save.ShowDialog() == DialogResult.OK)
                {
                    string fileName = save.FileName;

                    //创建excel对象
                    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                    if (excel == null)
                    {
                        MessageBox.Show("Excel无法启动", "提示");
                        return;
                    }

                    //创建工作薄
                    Microsoft.Office.Interop.Excel.Workbook excelBook = excel.Workbooks.Add(true);
                    Microsoft.Office.Interop.Excel.Worksheet excelSheet = (Microsoft.Office.Interop.Excel.Worksheet)excelBook.Worksheets[1];

                    //生成字段名
                    int k = 0;
                    for (int i = 0; i < dgv.ColumnCount; i++)
                    {
                        if (dgv.Columns[i].Visible)//不导出隐藏列
                        {
                            excel.Cells[1, k + 1] = dgv.Columns[i].HeaderText;
                            k++;
                        }
                    }

                    //填充数据
                    for (int i = 0; i < dgv.RowCount; i++)
                    {
                        k = 0;
                        for (int j = 0; j < dgv.ColumnCount; j++)
                        {
                            if (dgv.Columns[j].Visible)//不导出隐藏的列
                            {
                                if (dgv[j, i].ValueType == typeof(string))
                                {
                                    excel.Cells[i + 2, k + 1] = "" + dgv[j, i].Value.ToString();
                                }
                                else
                                {
                                    excel.Cells[i + 2, k + 1] = dgv[j, i].Value.ToString();
                                }
                            }
                            k++;
                        }
                    }

                    try
                    {
                        excelBook.Saved = true;
                        excelBook.SaveCopyAs(fileName);
                        MessageBox.Show("导出成功！");
                    }
                    catch
                    {
                        MessageBox.Show("导出文件失败，文件可能正在使用中", "提示");
                    }
                }
            }
        }


    }

When the form needs to use this Function, you need to write the following code:

private void btnoutExcel_Click(object sender, EventArgs e)
        {
            outputExcel form1 = new outputExcel();
            form1.RExcel("", dataGridView1);

        }

Related articles:

[c# tutorial] C# data type

mysql Connector C/C multi-threaded packaging

The above is the detailed content of C#_Call an encapsulated class to implement the function of exporting Excel tables. For more information, please follow other related articles on the PHP Chinese website!